A workflow for loading architecture decision records and software specifications into an agent session. ADRs record important design choices so later work can follow them.

Starting an architecture-aware session and loading decisions and specifications from one module or across a workspace.

It gives the agent the project’s existing architectural context instead of making decisions without those documents.

prime — Skill for Claude Code by joestump: A workflow for loading architecture decision records and software…

Install

Getting it into your agent

This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.

Claude Code

/plugin marketplace add joestump/claude-plugin-sdd

Claude Code

/plugin install sdd

Made for: Claude Code.

Or install sdd, the plugin that ships this one along with the rest of its 20 skills.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/skills/joestump/claude-plugin-sdd/prime.svg)](https://agentmods.dev/skills/joestump/claude-plugin-sdd/prime)

Your own site

<a href="https://agentmods.dev/skills/joestump/claude-plugin-sdd/prime"><img src="https://agentmods.dev/badge/skills/joestump/claude-plugin-sdd/prime.svg" alt="Measured on agentmods" height="20"></a>

Per session 42 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 4,617 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. Scan, not verified.

Origin original No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.00042	$0.04617
Opus 5	$0.00021	$0.02308
Sonnet 5	$0.00008	$0.00923
Haiku 4.5	$0.00004	$0.00462

Measured 2d ago against content hash 09cc82d79d8c, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

prime scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/prime/SKILL.md · 245 lines

How it starts

The opening of the file, as written. The whole thing — 245 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Prime Architecture Context

Harness portability. This skill runs on any agent harness that loads Agent Skills — Claude Code, Codex CLI, OpenCode, Crush. Tool names used below (AskUserQuestion, Task, TeamCreate, SendMessage, TaskCreate, ToolSearch, mcp__*, ${CLAUDE_PLUGIN_ROOT}) denote capabilities, not hard requirements: map each to your harness's equivalent or use the documented fallback per ${CLAUDE_PLUGIN_ROOT}/references/harness-compat.md. References to CLAUDE.md mean the project memory file (CLAUDE.md, AGENTS.md, or CRUSH.md) per harness-compat § "Project Memory File". A citation of the form shared-patterns.md § "Section" names one ## heading in that file — load only that section (see its "How to Read This File" note), never the whole file.

Load existing ADRs and specs into the session so Claude can give architecture-aware responses.

Process

Resolve artifact paths: Follow the Artifact Path Resolution pattern from ${CLAUDE_PLUGIN_ROOT}/references/shared-patterns.md § "Artifact Path Resolution" to determine the ADR and spec directories. If $ARGUMENTS contains --module <name>, resolve paths relative to that module; otherwise, in a workspace, aggregate across all modules. The resolved ADR directory is {adr-dir} and spec directory is {spec-dir}.

Cross-module aggregation: When in aggregate mode (no --module, workspace detected), iterate over all discovered modules. For each module, resolve its artifact paths independently. Prefix every artifact reference in the output with the module name in square brackets: [api] ADR-0001, [worker] SPEC-0003. When --module is provided, scope to that single module — no prefix needed. When in single-module mode (no workspace), operate normally without prefixes.
Check if init has been run: Read CLAUDE.md at the project root (or module root if --module is set) and check if it contains references to an ADR or spec directory. If CLAUDE.md does not exist or lacks SDD plugin references, output:

Read the full file on GitHub · 245 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

2d ago Changed 09cc82d79d8c
6d ago First seen · 245 lines · 42 tokens per session scan A b2c06cff660a

Subscribe to this mod's changes

prime is a skill published in the GitHub repository joestump/claude-plugin-sdd (32 stars, last pushed yesterday), licensed MIT. It adds 42 tokens to every session and 4,617 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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